On Sun, 20 Dec 2015, Stephen Dubovsky wrote:
> Date: Sun, 20 Dec 2015 21:59:26 -0500
> From: Stephen Dubovsky
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: "Enhanced Machine Controller (EMC)"
> Subject: Re: [Emc-users] Grounding Issues
>
> Peter, this is the root cause in the cha
On 12/20/2015 05:06 PM, John Thornton wrote:
> Well it works fine till I plug in the VFD so I guess I'll have to rewire
> the machine and my shop again :(
>
>
Well, that is now very important information! Just plugging
in the VFD, without having it start the spindle motor causes
the problem? The
I used to have problems with one particular LED board I designed that would
reset or stop talking on IIC bus when I turned on my workbench circular
fluorescent light. The type with the magnifying glass. Turned out to be a
PC board layout problem and pull up resistors in the wrong place and the
wr
Peter, this is the root cause in the change of behavior between <=2.6 and
2.7 w/ the 5i25+7i77 that a couple of us have been having (was discussed
here about a week ago)? I have noticed an occasional warning in the prior
version I was running (just at startup iirc.) I need to put some more
noise
Some of them tubes are Carbon fiber composite these days. Makes grounding
more fun.
- Original Message -
From: "John Dammeyer"
To: "'Enhanced Machine Controller (EMC)'"
Sent: Sunday, December 20, 2015 4:59 PM
Subject: Re: [Emc-users] Grounding Issues
> Don't get too carried away wit
On 12/20/2015 5:39 PM, Ken Strauss wrote:
> Have you considered that 15/64 is quite close to 6mm (~5.95mm)?
Yes, but the hole this has to fit is 15/64" and a 15/64" drill shank is
as perfect a fit as can be without being a press fit so I don't need to
mess that up.
---
This email has been chec
Don't get too carried away with Earth as the most important part of
grounding. After all those big metal tubes that fly through the sky aren't
connected to ground and they have all sorts of power systems from DC to AC
(if you can afford business class).
The point is to make sure that the current
John,
I'd still take a close look at your existing system to see if it is robust.
Perhaps an example from a different project my give you an idea. Bear with
me. The story is kind of long.
I designed an LED lighting system that ran of a 48V bank of batteries
charged by generator.
Charging cou
On 12/21/2015 12:59 AM, John Thornton wrote:
> An update, I made a star grounding configuration so EVERY ground comes
> from the same place. I tested with the VFD unplugged and all is fine,
> plug the VFD in and same problem sserial errors. The VFD is 220v so to
> use one power source I'd have t
Have you considered that 15/64 is quite close to 6mm (~5.95mm)?
> -Original Message-
> From: Gregg Eshelman [mailto:g_ala...@yahoo.com]
> Sent: Sunday, December 20, 2015 6:19 PM
> To: Enhanced Machine Controller (EMC)
> Subject: [Emc-users] OT: Anyone have a small piece of 15/64" drill rod
if you can get a scope (2 trace)
and _SEE_ the noise
from your machine ground to a good ground,
then you can see when you make a difference.
a good ground can be tested with a megger ( hard to find)
a good ground can be a copper rod driven 10 ft into good earth
so find the best you can and look to
On 12/20/2015 4:06 PM, John Thornton wrote:
> Well it works fine till I plug in the VFD so I guess I'll have to rewire
> the machine and my shop again :(
VFD output directly to motor and adequate noise filtering upstream of
the VFD?
---
This email has been checked for viruses by Avast antivirus
An update, I made a star grounding configuration so EVERY ground comes
from the same place. I tested with the VFD unplugged and all is fine,
plug the VFD in and same problem sserial errors. The VFD is 220v so to
use one power source I'd have to run new wire from the panel to the 220v
outlet and
I hope the procedure goes well.
Yes I have a scope.
JT
On 12/20/2015 1:23 PM, Gene Heskett wrote:
> But I am shortly going to be out of pocket till Monday afternoon.
> Cataract fixings in the XYL's right eye are scheduled for first thing
> in the morning, so we've reserved a room about a mile
John
You're welcome.
My _Go_To_ book is "Electromagnetic Compatibility Engineering" By Henry
W.Ott. Published by WILEY.
http://ca.wiley.com/WileyCDA/WileyTitle/productCd-0470189304.html
I've retained perhaps 5% and for a while the book went everywhere with me as
I tried to absorb the details.
I need a small chunk of 15/64" drill rod, about 4 to 6" long. Nobody
within 100 miles stocks drill rod, or not in "oddball" 64th sizes. I
don't need 3 feet of it either, like I'd have to get from online stores.
I could get a long shank drill bit and cut it off that, but single bits
in "odd" siz
Well it works fine till I plug in the VFD so I guess I'll have to rewire
the machine and my shop again :(
JT
On 12/20/2015 2:25 PM, John Dammeyer wrote:
> Hi John,
>
> It sounds as if you have two AC lines coming into the machine. One for the
> controller and one for the VFD. The comments abou
Hi John,
You are correct I have a 220vac and a 120vac line coming into the
machine. I didn't pull a 4 wire 220 line to those outlets in the shop so
no neutral is there. If making a star ground doesn't fix the issue then
I'll pull the 3 wire out and replace it with a 4 wire run. Not much fun
bu
On Sun, Dec 20, 2015, at 03:45 PM, Gene Heskett wrote:
> On Sunday 20 December 2015 04:27:39 Gene Heskett wrote:
>
> [... back to readable size, on my charge-pump detection to run the SSR's]
>
> > Has anyone else concocted such a circuit, and were you able to get
> > enough pump power out of it
There was a thread back in May (11-15) of 2015 Subject was "If there's one
thing I hate, all the noise, noise, noise, noise” where I was having strange
noise issues. There are a lot of helpful suggestions there for tracking down
noise. In my case the problem was an overly sensitive keyboard, b
On Sunday 20 December 2015 04:27:39 Gene Heskett wrote:
[... back to readable size, on my charge-pump detection to run the SSR's]
> Has anyone else concocted such a circuit, and were you able to get
> enough pump power out of it running the BoB on 5 volts, with the pump
> at 500 hz, to run an SSR
Hi John,
It sounds as if you have two AC lines coming into the machine. One for the
controller and one for the VFD. The comments about a single star ground
point are standard industry practice. One breaker at the panel which
protects the wire to the machine. Another breaker inside the machine
John,
On 12/20/2015 06:31 AM, John Thornton wrote:
> I'll start with a couple of photos of the el cabinets before breakfast
> and get more details after.
>
> http://gnipsel.com/images/bp-knee-mill/bpel01.jpg
> http://gnipsel.com/images/bp-knee-mill/bpel02.jpg
>
> JT
>
We used to have cabinet grou
I bought some Weidmuller WPE6 off ebay for less than $1/ea. In fact, I bought
various DIN terminal blocks off ebay for a fraction of the price new. I’d
watch ebay, you may find a deal…
http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC0.H0.XWEIDMULLER+WPE6.TRS0&_nkw=WE
On Sunday 20 December 2015 13:37:38 John Thornton wrote:
> On 12/20/2015 11:47 AM, Gene Heskett wrote:
> > On Sunday 20 December 2015 12:15:21 John Thornton wrote:
> >> Back from shopping...
> >>
> >> Pencil sketch of the power side
> >> http://gnipsel.com/images/bp-knee-mill/bpel03.in
> >
> > the
On 12/20/2015 11:47 AM, Gene Heskett wrote:
> On Sunday 20 December 2015 12:15:21 John Thornton wrote:
>
>> Back from shopping...
>>
>> Pencil sketch of the power side
>> http://gnipsel.com/images/bp-knee-mill/bpel03.in
> the left box probably needs the paint cleaned off under it, and maybe a
> s
On Sun, 20 Dec 2015, John Thornton wrote:
> Date: Sun, 20 Dec 2015 12:26:51 -0600
> From: John Thornton
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: "Enhanced Machine Controller (EMC)"
> Subject: Re: [Emc-users] Grounding Issues
>
> I have a line reactor for the VFD but I've nev
The bpel04 has a star washer and the stud is welded to the back plane.
The cases are bolted tight to the main column. The DIN rail is fastened
down with star washers and the locking screws are tight.
JT
On 12/20/2015 11:42 AM, Dave Caroline wrote:
> The din rail in the 05 pic is that real tight
I have a line reactor for the VFD but I've never hooked it up.
http://www.automationdirect.com/adc/Shopping/Catalog/Drives/AC_Drive_%28VFD%29_Spare_Parts_-a-_Accessories/AC_Line_Reactors/LR-23P0-1PH
Speaking of VFD's mine is grounded to the breaker panel and not in the
machine anywhere. When I c
On Sunday 20 December 2015 12:15:21 John Thornton wrote:
> Back from shopping...
>
> Pencil sketch of the power side
> http://gnipsel.com/images/bp-knee-mill/bpel03.in
the left box probably needs the paint cleaned off under it, and maybe a
star washer under the spade lug for extra connection bite
On 12/20/2015 05:20 AM, John Thornton wrote:
> I have a BP knee mill with an Anilam 1100M CNC kit on it. I've removed
> all the Anilam controls a while back. I've retained the drives and power
> supply and added a GS2 VFD for the spindle. I have a 5i25 7i77 setup.
> From the get go I've had probl
The din rail in the 05 pic is that real tight to the back panel (add
star washers to cut through paint), make sure the green/yellow blocks
have the middle screw tight.
One mighty thin grounding wire in bpel04.jpg, also could add star
washer to cut through paint
You could measure the ground resist
Back from shopping...
Pencil sketch of the power side
http://gnipsel.com/images/bp-knee-mill/bpel03.jpg
Incoming terminal block on left panel where extra ground is
http://gnipsel.com/images/bp-knee-mill/bpel04.jpg
next terminal block on right panel
http://gnipsel.com/images/bp-knee-mill/bpel05.j
On 12/20/2015 8:37 AM, Gene Heskett wrote:
> Start with a roll of flat braid equ to a 8 or 10 gauge wire. Establish a
> bolt to the case of the controller as a master ground, and make sure
> everything that references ground in the controller box is grounded at
> this bolt.
>
> Tie this bolt to t
On Sunday 20 December 2015 08:20:38 John Thornton wrote:
> I have a BP knee mill with an Anilam 1100M CNC kit on it. I've removed
> all the Anilam controls a while back. I've retained the drives and
> power supply and added a GS2 VFD for the spindle. I have a 5i25 7i77
> setup. From the get go I'v
John
Some things to look for.
1: Make sure that you field supply is not grounded to the same ground as
the VFD. I.E the 24v Filed supply must be floating.
2: All cables must be screened where possible.
3: Screen must only be connected at the source and and to one single
place to the physical eart
I'll start with a couple of photos of the el cabinets before breakfast
and get more details after.
http://gnipsel.com/images/bp-knee-mill/bpel01.jpg
http://gnipsel.com/images/bp-knee-mill/bpel02.jpg
JT
On 12/20/2015 7:57 AM, Dave Caroline wrote:
> It might help to draw a diagram showing the el
Ok, I'll work on that this morning.
Thanks
JT
On 12/20/2015 7:57 AM, Dave Caroline wrote:
> It might help to draw a diagram showing the electronics (drives
> modules etc) and where they are grounded showing outlines of the
> cases.
>
> This is to get an idea where any common mode interference sig
It might help to draw a diagram showing the electronics (drives
modules etc) and where they are grounded showing outlines of the
cases.
This is to get an idea where any common mode interference signals can come from.
Also pictures of the wiring with annotation of wire bundles to get an
idea of an
I have a BP knee mill with an Anilam 1100M CNC kit on it. I've removed
all the Anilam controls a while back. I've retained the drives and power
supply and added a GS2 VFD for the spindle. I have a 5i25 7i77 setup.
From the get go I've had problems with the electronics on this machine.
The VFD
On Saturday 19 December 2015 19:46:23 Gene Heskett wrote:
> On Saturday 19 December 2015 18:34:23 Gene Heskett wrote:
> > On Saturday 19 December 2015 18:07:58 Gene Heskett wrote:
> > > My google-fu seems unusable for this.
> > >
> > > The SSR's arrived this afternoon, and I need to figure out wha
41 matches
Mail list logo
